TY  - JOUR
AU  - Cousot, Patrick
AU  - Cousot, Radhia
TI  - A constructive characterization of the lattices of all retractions, preclosure, quasi-closure and closure operators on a complete lattice
JO  - Portugaliae mathematica
PY  - 1979
SP  - 185
EP  - 198
VL  - 38
IS  - 1-2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/PORMA_1979__38_1-2_115380/
LA  - en
ID  - PORMA_1979__38_1-2_115380
ER  -